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Jpn J Biomechanics Sports Exercise 9(4):196-204, 2005

Analysis of the race-pattern for elite male 400-m hurdlers

Yasunori MORIOKA1), Yasushi ENOMOTO2), Masaaki SUGITA3)
Akifumi MATSUO4), Michiyoshi AE5), Kando KOBAYASHI6)

1)Sports Science Laboratory, Japan Sports Associatio
2)Faculty of Education, Kyoto University of Education
3)Faculty of Education, Mie University
4)Japan Institute of Sports Science
5)Institute of Health and Sport Sciences, University of Tsukuba
6)Graduate School of Arts and Sciences, University of Tokyo

Abstract

This study was intended to clarify the relationship between features of change velocity and performance of elite athletes in men?fs 400-m hurdles (400mH). Races of 400mH were videotaped with several video cameras panning from start to goal at 60 fields/s. After a time indication was superimposed on each field of the VTR images, the time at touchdown immediately after hurdling was recorded. Using the flash of the starter?fs gun recorded on the VTR image, each hurdle touchdown time from the start and each section (hurdle to hurdle)time was obtained. Each section was defined as follows:S1 was from the start to 2nd hurdle;S2 was from the 2nd to 5th hurdle, S3 was the 5th to 8th hurdle, and S4 was from the 8th hurdle to finish. Results of the regression analysis showed significant correlations between the 400mH race time and the total number of steps from hurdle to hurdle (TNS;r = 0.397, p<0.05), S2 time (0.673, p<0.001), and S3 time (r = 0.865, p<0.001), and the rate of deceleration from S1 to S2 (r = 0.367, p<0.05), and from S2 to S3 (r = 0.421, p<0.01), and the rate of S3 time in the race time (r = 0.463, p<0.01). These results indicate that it is important to decrease TNS and to prevent decreasing velocity in S2 and S3, to attain a high performance.

Key Words: section time, rate of deceleration, rate of section time, pace distribution

Submittted for Publication : May 30, 2005,

Accepted for Publication : Oct. 19, 2005

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